foo.cc: In function 'int main()':
foo.cc:8:8: warning: unused variable 'a' [-Wunused-variable]
    int a,b,c,d,e,l,z,x,n;
        ^
foo.cc:8:10: warning: unused variable 'b' [-Wunused-variable]
    int a,b,c,d,e,l,z,x,n;
          ^
foo.cc:8:12: warning: unused variable 'c' [-Wunused-variable]
    int a,b,c,d,e,l,z,x,n;
            ^
foo.cc:8:14: warning: unused variable 'd' [-Wunused-variable]
    int a,b,c,d,e,l,z,x,n;
              ^
foo.cc:8:16: warning: unused variable 'e' [-Wunused-variable]
    int a,b,c,d,e,l,z,x,n;
                ^
foo.cc:8:18: warning: unused variable 'l' [-Wunused-variable]
    int a,b,c,d,e,l,z,x,n;
                  ^
foo.cc:8:20: warning: unused variable 'z' [-Wunused-variable]
    int a,b,c,d,e,l,z,x,n;
                    ^
foo.cc:8:22: warning: unused variable 'x' [-Wunused-variable]
    int a,b,c,d,e,l,z,x,n;
                      ^

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